ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.8 > M65.81 M65.81 Other synovitis and tenosynovitis, shoulder Non-Billable/Non-Specific Codes M65.811Other synovitis and tenosynovitis, right shoulderM65.812Other synovitis and tenosynovitis, left shoulderM65.819Other synovitis and tenosynovitis, unspecified shoulder